Vilitra can be safe when it contains vardenafil and is used at an appropriate prescribed dose. Safety depends on your health conditions, dose, and other medicines. Do not use with nitrates such as nitroglycerin or isosorbide, because the combination can cause a dangerous drop in blood pressure. Common side effects include headache, flushing, indigestion, nasal congestion, and dizziness. Vardenafil Vilitra require extra caution with certain heart conditions, low blood pressure, liver problems, or interacting medicines. Seek urgent medical attention for an erection lasting more than 4 hours, sudden vision or hearing loss, or severe chest symptoms. Different Vilitra strengths are marketed, so don't assume a higher strength is safer or more effective. If you're considering Vilitra for ED, a healthcare professional can confirm whether vardenafil is appropriate and which strength is suitable.